Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The specific resource at `/api/v1/policies/44` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC (USD Coin) on Base with no API keys, no rate limits, and no commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments via the "exact" scheme on Base. The payment is directed to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC at contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The max amount required is 20,000 base units, which at 6 decimals equals $0.02. The response MIME type is `application/json`.
However, the specific functionality behind `/api/v1/policies/44` is unclear. The provider's landing page lists various API categories but does not include a "policies" endpoint in its public catalog. No OpenAPI schema, detailed documentation, or example request/response payloads are available. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. As a result, the actual data or service returned by this particular endpoint remains unknown.
Capabilities
Use cases
- —Accessing premium data or policy information via a single paid HTTP call
- —Integrating pay-per-use API access into agent workflows without managing API keys
- —Demonstrating x402 payment protocol integration on Base
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents needing keyless, on-demand API access settled in USDC on Base
- —Low-volume consumers who prefer per-request pricing over subscriptions
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited plans
- —Anyone needing a clearly documented policies/compliance data source
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/44 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no example requests or responses, and the specific purpose of /api/v1/policies/44 is not described anywhere in the crawled material. The docs pages are empty beyond a wallet connect prompt.
Warnings
- —The specific endpoint /api/v1/policies/44 is not listed in the provider's public API catalog — its purpose is unknown.
- —No documentation, OpenAPI spec, or example payloads are available for any endpoint on this provider.
- —All non-landing pages (docs, pricing, API, README) render only 'Connect wallet' with no content.
- —The functionality behind 'Premium API Access' at this path is entirely opaque.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge specifies maxAmountRequired of 20000 base units in USDC (6 decimals) = $0.02, on Base network.https://lowpaymentfee.com/api/v1/policies/44
- —The provider lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/policies/44